Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2004-03-24
Phys.Rev. D70 (2004) 054508
Physics
High Energy Physics
High Energy Physics - Lattice
12 pages,15 figures, one reference added, minor corrections
Scientific paper
10.1103/PhysRevD.70.054508
We study the scalar and pseudoscalar condensations and the eta^prime meson correlators of the two-flavor massive Schwinger model in the non-zero theta vacuum. Exploiting our new method which was developed to investigate topological effects in the previous work, we find that the pseudoscalar condensation is non-zero and there exists a long-range correlation of the eta^prime meson. This phenomenon is well described by the clustering property. We also find that even in theta=0 case the cancellation of the long-range correlation is nontrivial and requires accurate contributions from higher topological sectors. Our results imply that the fluctuation of the ``disconnected'' diagram originates from the pseudoscalar condensation in each topological sector.
Fukaya Hidenori
Onogi Tetsuya
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